.ex_box {
    width: 100%;
    height: 800px;
    background: #F0F4FB;
    color: black;
    position: relative;
}

.ex_title {
    text-align: center;
    font-size: 35px;
    font-weight: 900;
}

.ex_item {
    margin-left: 10%;
    width: 600px;
    text-align: center;
    display: flex;
    position: absolute;
    left: calc(40% - 300px);
    font-size: 14px;
    font-weight: bold;
}

.ex_item .ex_text {
    width: 65px;
    text-align: center;
    margin-top: 30px;
    margin-bottom: 30px;
}

.ex_item .ex_gao {
    width: 65px;
    margin-top: 30px;
    margin-bottom: 30px;
    text-align: center;
    color: #4E79E5;
}

.ex_itemimg {
    width: 1100px;
    margin-left: calc(50% - 550px);
    margin-top: 70px;
}

.ex_itemimg .ex_imgs {
    width: 100%;
    height: 520px;
    text-align: center;
    overflow: hidden;
}

.ex_itemimg .ex_imgs img {
    width: 100%;
    height: 520px;
}